[[snowmass2013:montecarlo| <<back]]

======  How to generate events with pileups ======


This is a tutorial explaining how to generate HERWIG++ signal plus pile up events.
You need a Linux computer (this was tested on SL5.9) with installed ROOT. Also, certain libraries require "boost" library:

<code>
yum install boost-devel
</code>


Then get this tar file which includes HERWIG++, ThePEG, Delphes 3.08, Pythia8, HEPMC.
[[http://mc.hep.anl.gov/asc/snowmass2013/delphes36/packages/package.tgz| package.tgz]]

<code bash>
export PATH=.:$PATH
wget http://mc.hep.anl.gov/asc/snowmass2013/delphes36/packages/package.tgz
tar -zvxf package.tgz
cd package_snowmass13
build.sh # if this is SL5.9, do not need to run this script!
</code>


The build script attempts to detect your environments and the installs HERWIG++, ThePEG, Delphes 3.08, HEPMC (not in the same order)
If some luck, installation can be successful. 

To generate pileup (example):

<code bash>
cd  herwigpp/run_pileup_ttbar_highPT
A_RUN_pileup.sh*
</code>

To generate signal:
<code bash>
cd  herwigpp/run_pileup_ttbar_highPT
A_RUN_signal.sh
</code>

Please examine it. If you need to change the signal events, look at the HERWIG++  "LHC_signal.in" card, where you can set needed process.

 

 --- //[[chekanov@anl.gov|Sergei Chekanov]] 2013/03/19 21:06//
 --- //[[A.Vaniashine]] 2013/03/19 21:06//